Tool-holder.



' A. H. CLERMONT L 11. s. BRAYTONJV I TOOL HOLDER.

APPL1cA1|oN FILED Aue.9.1915.

Toot-HOLDER. y

Application led August 9, 1915. Serial No. 44,4%).

To all whom itmag/ concern:

Be it known thatwe, ARTHUR H. CLER- MONT andRoBEn'r'Sl BRAY'roN, citizensV of the -United States, residing at 'Madisom .county of Dane,and State of 'l/Visconsin,

haveinvented certain new. and useful Im-V yprovements rin Tool-Holders, of which thefollowing is a specification.

Our invention relates to chucks or tool holders for boring toolsl and the object of our invention is to provide a device of lthe class mentioned adapted for use in conjunction with drill presses, boring machines, etc.,

'which may be quicklyadjusted for the pur,-

pose of boring holes. of different diameters without necessitating a change inthev tool.

A further object of our invention is to provide a device as mentioned adapted for use in conjunction with lathes, drillY presses,

boring machines or lany, other machine of like character equipped with `a tool socket. A further object of our inventionis to provide a device of the class under consideration wherein the tool may be locked in any position throughout the range ofthe device and is readily unlocked for readjustment.

A furtherl object of our invention is to provide a device of the character mentioned whereby the tool may be secured vwithin the same or removed for grinding and repair without disassembling the device. 1 V- vFurther objects of our invention are to provide adevice as mentioned which'shall be of few parts, which shall have a wide range in proportion to its size and which may be readily carried in the tool box or Akit of a mechanic without occupying much s ace.

pOther objects willappear hereinafter.

With these objects in view our invention consists generally in an outer shell or casing provided with an eccentric shank adapted to t within the tool holder of a machine, a rotary member or core mounted within said shell or casing and provided with an eccen-v trically disposed tool socket or holder, said shell and core being provided with frictional locking faces and means for holding saidv faces vin locking engagement.

Our invention further consists in a device as mentioned further-characterized by havL ing said locking facesof conical form, a screw for normally holding said faces. in engagement and a springnormally bearing against the inner'end of saidscore to release said faces from locking engagement `when said screw 1s loosened. l

Our inventionafurther consistsY in toolA holderor chuck as mentioned equipped with set screws threaded through the wall of' the core into the toolsocket for locking the tool therein 'and further' characterized by providing the shellwith an aperture giving access to said screw. whereby the tool v may lbe secured Awithin .the socketA or releasedftherefrom as desired without disassembling'the device. .j

Our invention further consists in various detailsy of construction and arrangement of parts all as will be 'fully described hereinafterandparticularly pointed out in the claims. Y

Spec'cation of Letters Patent. 'Patented Rial'. 1916. i

Our invention will be more readily un l derstood 'by reference to the accompanying drawings. forming a part voffthis specificaf tion and in which-9 Figurel is an elevation of a). tool holder i. l

embodying our..invention in its preferred f Y form, Fig. 2 is a central longitudinal section of the same, Fig. 3 is a bottom; planV view l*of the device, Fig. .4 a perspective view lof the outer member or shell, Fig. is a similar View of the inner member or core, and Fig. 6 isatransverse section on `iaeiernng new@ the firawingsi indicates the outer member or shell -which comi prises a cylindrical Vmember provided with a cylindrical bore 2 terminating in a frustoconical inner, portion 3. Theshell l is provided atits closed endV 4 with a shank 5l adapted to lit within the tool holder ofany boring or drill-ing machine, lathe or the like, and arranged parallel to but eccentric with relation to thefaXisof the shell l. Fitting snugly within the bore 2 of the'shell l is an inner member or core 6 provided with an aXial bore 7. The member 6 extends the full length of the cylindrical portion of the bore v ber l. Said screw is provided withv a head v10 fitting within the enlarged outerend of vthe bore 7 and against a shoulder lljformed CTT- therein. the screw 9 the head 10 by engaging the shoulder 11 will force the frictional face 8 into locking engagement with the face 3. Located between the end of the member 6 and the wall e of' the member 1, is a leaf spring 12 extending diametrically across the device and provided at its center with a per` `foration 13 .to receive the adjacent portion of the screw 9. i

rfhe outer end o'f the member 6 is provided with a head comprising a portion 11i preferably of the saine diameter as the outer diameter of the member 1 and an outer portion 15 of 'slightly greater diameter. The

outer face ofthe portion 14 is graduated as indicated at 16 and the periphery 0f. the portion 15 is knurled to facilitate turning the core. Q

rfhe core 6 is provided with an eccentrically positioned tool socket 17, the eccenn tricity of which is the same as that ofthe shank 5 so that the' tool mounted thereinV may be brought into perfect alinementl with the shank 5.

18 indicates set screws threaded through the wall of the member 6 to impinge against the shank of the tool within thetool socket knurled periphery of the portion 15 the core .spring 12 completes the device.

6 may be rotated tov position the tool at any degree ofeccentricity with relation to the shank 5 and this adjustment may be accurately determined by means of the grade nations 16. When the member 6 isto be rotated, the screw 9 is loosened and when so loosened the spring 12 will force the locking faces 3 and 8 out of engagement thereby permitting ready adjustment of theV device. Tightening of the screw 9 will bring the conical faces 3, and 8 into locking engagement thereby rmly holding the tool in adjusted position.

1t will be seen that the device above described is of simple construction, consisting ofvbut the shell and core kconnected by the screw 9, and one or more set screws 18 for securing the tool within its socket and the iVith the construction set forth the eccentricity of the tool with relation to the shank 5 may be varied to such extent that the range of the device is large in comparison to its size; that is a device of but slightly more than two inches diameter may be adjusted to bore holes from the diameter of the tool` held Vwithin the socket up to two inches in diameter. Being of small size it may be readily it isobvious that by tightening` spring interposedv betweenV the end wall of f the sh'ell and the end of said core, and an eccentric shank on said shell, said core being provided with an eccentric tool socket, substantially as described.

2. A device' of the class described comprising a shell, acore rotatably mounted therein, said shell and said core being provided with coperating Vfriction locln'ng faces, means for securing said faces in locking engagement, meansl for moving said faces out ofoperative engagement when said securingmeans is released, and an eccentric shank on said shell, said core being provided with aV tooll socket, substantially as described.

31 A device ofthe class described comprising a shell, a rotary tool holding member mounted therein, means for locking the same against rotationv within said shell, an eccentric shank on said shell, and a set screw threaded through vsaid 'tool holding member for securing the shank of the tool therein and the wall of said shell being provided with an aperture whereby access may be had to said screw, substantially as described. i

e., A device of the class described comprising a cylindrical shell, a tool holding core freely rotatable within said shell, cooperating frusto-conical friction locking faces on said shell and said core, means for holding said faces in locking engagement and an eccentric shank on said shell, said core being provided with an eccentric tool holding socket, substantially as described.

5. A device of the class described comprising aV cylindrical shell provided with an eccentric-shank, a core freely rotatable within said shell, said core having an enlarged portionv of equal diameter with that of said shell and fitting against the outer edge of saidshell, said portion being graduated and terminating in a slightly enlarged knurled port-ion, said core beingl provided with an eccentrically positioned tool socket and cooperating frictional faces on said core and shell respectively andmeans for locking said faces in operative engagement, substantially as described.

6. A device of the class described comprising a cylindrical shell provided with an eccentric shank,a core freely rotatable Within said shell, said core having an enlarged portion of equal diameter With that of said shell and fitting against the outer edge of said shell, said portion being graduated and terminating in a slightly enlarged knnrled portion, said core being provided with an eccentrically positioned tool socket and cooperating frusto-conical frictional faces on v 10 said core Vand shell respectively and means for locking said faces Vin operative engage- 4 ,l y

ment, substantially as described.

In testimony whereof We have signed ourl names to this specification injthe. presence of two subscribing Witnesses.

ARTHURY H. CLERMONT. vROBERT S. BRAYTON.

Witnesses:

S. LOEWENTHAL, A. W; WILSON.

Copies `of this patent may 'be obtained for five cents each, by addressing the Commissionei` of Patents,"v

Washington, D. C. 

